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30th June 2007 12:31 AM

Terje

RE: Am I right about the mast foot position all the way back on an F-type?

I tried new setting yesterday, during a cool session 10/14kts, 8,4m² on FT-138.
First I moved back the harness line --> the sail was more balanced in the upper range.
Then, I move back the straps (now on the latest hole) and the mast foot --> board seems to higher on the water, catching less chops and be globally quicker. Noticable improvement.
The only drawback may be an increase pressure on the back foot and a front foot that intend to exit the strap.
Maybe I have to change my position on the board to be more on the front foot.

Terje

29th June 2007 12:20 AM

Guest

RE: Am I right about the mast foot position all the way back on an F-type?

lines further back is of course only part of the equation, 28+ lines too
center of gravity to your advantage!

28th June 2007 12:55 AM

kimax

RE: Am I right about the mast foot position all the way back on an F-type?

2Terje: Longer harness lines makes it easier to go downwind, I&#39;ve just tried it two days ago (I have adjustable). I was surprised how much more control I gained when making them longer in downwind sailing.

25th June 2007 07:09 PM

Terje

RE: Am I right about the mast foot position all the way back on an F-type?

Quote:

Guest wrote:
FT138 MF all the way back, boom chin high.

I tried the mast foot all the way back : my front foot was going out of the strap. But it was quite windy for the 8,4 sail, and my line were maybe to forward.
I will experiment with the lines further back.

And concerning the strap position, what would you suggest ?
At the time, I still can move them backwards (one hole left behind).

Terje

25th June 2007 10:47 AM

o2bnme

RE: Am I right about the mast foot position all the way back on an F-type?

Quote:

Guest wrote:
If you feel like you have to push the rig towards the nose to keep from going upwind chances are you lines are too far forward (sometimes your front foot wants to exit the straps??) (-> lines further back, helps you going downwind as well).
FT138 MF all the way back, boom chin high.
BTW fear of getting catapulted == good, just make sure it doesn&#39;t happen.

I tend to agree. I am 65kg and have stopped putting my mast foot forward at all. I always leave it as far back as possible. If the board takes off, I&#39;m getting better at controlling this situation ... I can push the rail down by leaning forward and putting weight on the front foot. Even when I lean forward, though, I am primarily putting weight on my back foot. This is because I tend to sail with a larger fin to be sure I can get through the lulls.

25th June 2007 05:15 AM

Guest

RE: Am I right about the mast foot position all the way back on an F-type?

If you feel like you have to push the rig towards the nose to keep from going upwind chances are you lines are too far forward (sometimes your front foot wants to exit the straps??) (-> lines further back, helps you going downwind as well).
FT138 MF all the way back, boom chin high.
BTW fear of getting catapulted == good, just make sure it doesn&#39;t happen.

25th June 2007 04:51 AM

Terje

RE: Am I right about the mast foot position all the way back on an F-type?

Hi all,

Very interesting info from your tuning of the FT148.

I have a FT 138 that I ride with a 8.4 + 52cm stock fin (rider = 68kg)
The mast foot is located in the middle of the box.

With this setting, the board is going up wind very easily, too much I would say, as I have great difficulties to make it going downwind.
When going down wind the nose of the board is low and is frequently catching some chops. I am in a very instable position, strongly pull forward and in a fear to be catapulted.
I tried to move the mast foot all the way backward ==>I was doing lost of spinout, with my front foot intending to extit the strap. Not so ggod.

Which setting would you recommand to adjust ?

Thanks,

Terje

24th June 2007 09:00 PM

Roger

RE: Am I right about the mast foot position all the way back on an F-type?

Hi Guest/Marek,
If the wind has huge gusts (more than 5 knots higher than the ambient wind) you may be simply overpowered. That requires a change to a smaller rig, or some serious tuning of your existing rig to depower it.
If you can&#39;t sheet in, you can&#39;t put your weight on the rig.
With no weight on the rig, 2 things happen.
You don&#39;t get any mast foot pressure, and your weight goes right on the upwind rail.
So, the board does precisely what you are telling it to do.
No mast foot pressure to drive the nose down, causes your board to turn upwind.
Weight on the upwind rail tips the board to windward (windward rail lower than the downwind rail) and the board follows the rockerline upwind due to the shape of the bottom.
Flatten your sail out (more downhaul and more outhaul to reduce it&#39;s power and increase the twist at the top of the sail) and you may be able to sheet in OK, and then you can commit all your weight onto the rig, via the harness lines, and get your weight off the upwind rail and back onto the rig, driving the board through the mast foot.
Then you can use your legs and feet to adjust the roll angle of your board so you go straight ahead, on a beam reach; upwind by lifting with your front foot and pushing across the top of the fin with your back foot; or down wind by unraking your sail slightly and pushing with the heel of your front foot to "push" the nose of the board off the wind.
Hope this helps,

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